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A novel power on reset (POR) circuit with brown out (BO) detector having zero steady state current consumption is proposed. The circuit has been designed in 65nm CMOS process at a single supply of 1.1V. Both the POR and BO thresholds are independently adjustable in the circuit. Simulation results show that the POR threshold does not depend upon the supply(More)
2D quantitative structure–activity relationships (2D QSAR) and hologram quantitative structure–activity relationship (HQSAR) studies were performed on a series of polysubstituted quinoline derivatives as inhibitors of phosphodiesterase 4 (PDE4). The dataset was divided into training set and test set by K-means clustering. 2D QSAR study was carried out using(More)
Quantitative structure activity relationship approach using stepwise regression analysis was applied to a series of 4-quinolone derivatives as high-affinity ligands at the benzodiazepine site of brain GABA(A) receptors. For the purpose 25 compounds were used to develop models. Statistically significant equations were obtained with high squared correlation(More)
The chemistry of pyrazoloquinolines is well established. This system has proved to be a very attractive scaffold for medicinal chemist in the recent past. Pyrazoloquinolines were extensively studied as bioactive compounds and are known to possess remarkable biological activities such as anti cancer, anti-anxiety, anti-inflammatory, anti-asthmatic,(More)
Phosphodiesterase 4 (PDE4) has been established as a drug target for inflammatory diseases of respiratory tract like asthma and chronic obstructive pulmonary disease. The selective inhibitors of PDE4B, a subtype of PDE4, are devoid of adverse effects like nausea and vomiting commonly associated with non-selective PDE4B inhibitors. This makes the development(More)
3D QSAR models using 3D pharmacophore, CoMFA, and CoMSIA approaches were developed for a series of quinoline derivatives as PDE4 receptor antagonists. Hypogen method was used to engender the 3D pharmacophore model. The top scoring four feature pharmacophore models, Hypo1 contains one hydrogen-bond acceptor, two hydrogen-bond donors, and a hydrophobic(More)
Human African Trypanosomiasis is endemic to 37 countries of sub-Saharan Africa. It is caused by two related species of Trypanosoma brucei. Current therapies suffer from resistance and public accessibility of expensive medicines. Finding safer and effective therapies of natural origin is being extensively explored worldwide. Pentamidine is the only available(More)
In the present study, three dimensional quantitative structure activity relationship (3D QSAR) models using 3D Pharmacophore, CoMFA and CoMSIA approaches were developed for a series of phenyl alkyl ketone derivatives as PDE4 receptor antagonists. An ideal 3D QSAR pharmacophore model was developed and validated using external test set, Fischer's(More)
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